专利号:WO-2022155981-A1 优先权日:2021-01-25 标题 :USE OF N-HETEROCYCLIC CARBENE-BASED COMPOUNDED NICKEL (II) COMPLEX IN SYNTHESIS OF α-BENZYL BENZOFURAN COMPOUND 发明人:SUN HONGMEI; SHUI YU; JIN WENHUI 权利人:UNIV SOOCHOW 摘要:Disclosed is the use of an N-heterocyclic carbene-based compounded nickel (II) complex in the synthesis of an α-benzyl benzofuran compound. In the present invention, an air-stable compounded nickel (II) complex Ni[P(OEt) 3 ]{[R`NC(CH 3 )C(CH 3 )NR`]C}Br 2 is used as a catalyst, wherein R` is 2,4,6-trimethylphenyl, and the α-benzyl benzofuran compound is synthesized by means of a hydrogen heteroarylation reaction of an aryl ethylene compound and a benzofuran compound in the presence of an organic base. The operability and substrate applicability of the catalyst are obviously better than those of the prior art, and meanwhile, the nickel catalyst has a higher practical application value due to the air stability and easiness of synthesis thereof.
专利号:US-5998627-A 优先权日:1997-08-04 标题 :Preparation and uses of hydrocarbylnitrones 发明人:THERIOT KEVIN J 权利人:ALBEMARLE CORP 摘要:Nitrones are produced by reaction of primary amine with aldehyde or ketone, in the presence of a transition metal-containing oxidation catalyst, and a peroxidic compound. The nitrone can then be reacted with a vinylaromatic compound to produce a 2-hydrocarbyl-5-arylisoxazolidine. Both such reactions can be conducted concurrently by including the vinylaromatic compound in the initial reaction mixture. Hydrogenation of the 2-hydrocarbyl-5-arylisoxazolidine, e.g., using hydrogen and a palladium-carbon catalyst, forms an N-hydrocarbyl-3-aryl-3-hydroxypropylamine. Such reactions enable, inter alia, synthesis of the racemic hydrochloride salt of N-methyl-3-phenyl-3-[4-trifluoromethyl)phenoxy]-propylamine, known generically as fluoxetine hydrochloride, a widely used antidepressant.
专利号:US-8716532-B2 优先权日:2009-03-27 标 题:One pot multicomponent synthesis of some novel hydroxy stilbene derivatives with alpha, beta-carbonyl conjugation under microwave irradiation 发明人:SHARMA ABHISHEK; SINHA ARUN KUMAR; KUMAR RAKESH; SHARMA NAINA 权利人:SHARMA ABHISHEK; SINHA ARUN KUMAR; KUMAR RAKESH; SHARMA NAINA; COUNCIL SCIENT IND RES 摘要:The present invention provides a method for the preparation of some novel multiconjugated 2- or 4-hydroxy substituted stilbenes. The method provides one pot multicomponent approach wherein 3-4 step reaction sequences viz. condensation, decarboxylation and Heck coupling occur simultaneously which results in an enhanced yield of desired products and reduced reaction times.
专利号:US-8742045-B2 优先权日:2009-06-03 标题:Polymerization initiator for living radical polymerization 发明人:GOTO ATSUSHI; KIM JEONG SIK; TSUJII YOSHINOBU; FUKUDA TAKESHI 权利人:GOTO ATSUSHI; KIM JEONG SIK; TSUJII YOSHINOBU; FUKUDA TAKESHI; UNIV KYOTO 摘要:Provided is a method of living radical polymerization which does not necessitate complicated and intricate synthesis of a dormant species and which is highly efficient. A halogenated derivative compound is used as a dormant species for initiating living radical polymerization. The derivative compound is obtained by halogenating an alcohol compound having a non-conjugated structure or an amine compound having a non-conjugated structure with a halogenating agent capable of halogenating an alcohol or amine. A radical produced by elimination of halogen from the halogenated derivative compound is allowed to react with the unsaturated bond of the monomer. Thus, the monomer, which has a radical-reactive unsaturated bond, is polymerized by living radical polymerization. Preferably, the halogenating agent is a compound (NIS or the like) which also has a function as a catalyst.
专利号:US-5187288-A 优先权日:1991-05-22 标 题 :Ethenyl-substituted dipyrrometheneboron difluoride dyes and their synthesis 发明人:KANG HEE C; HAUGLAND RICHARD P 权利人:MOLECULAR PROBES INC 摘要:This invention relates to ethenyl-substituted derivatives of dipyrrometheneboron difluoride dyes that have an absorption maximum at wavelengths longer than about 525 nm, and are electrically neutral, highly photostable and, in most cases, highly fluorescent with relatively narrow absorption and emission spectra. The ethenyl-substituted dyes generally have the structure: wherein at least one of the fluorophore substituents R1-R7, is an ethenyl group of the formula -CXm=CYm-Zm, where m is any combination of locations 1, 2, 3, 4, 5, 6, and 7 corresponding to the location of parent fluorophore substituents R1-7. The initial ethenyl substituents Xm, Ym, and Zm, which may be the same or different, are halogen, alkyl (containing 1-10 carbon atoms), cyano, ester, amide, ethenyl or polyethenyl, aryl or heteroaryl. The non-ethenyl substituents, which may be the same or different, are hydrogen, halogen, alkyl (containing 1-18 carbon atoms), aryl, arylalkyl, heteroaryl, acyl or sulfo.
专利号:US-4734495-A 优先权日:1985-07-17 标 题 :Process and intermediates for beta-lactam antibiotics 发明人:EVANS DAVID A; SJOGREN ERIC B 权利人:HARVARD COLLEGE 摘要:1-Benzyl(or substituted benzyl)-3β-[4(S)-aryloxazolidin-2-one-3-yl]-4β-(2-arylvinyl)azetidin-2-ones are provided via cycloaddition of a 4(S)-aryloxazolidin-2-one-3-ylacetyl halide and an imine formed with a benzylamine and a 3-arylacrolein, e.g. cinnamaldehyde. The azetidinones are useful chiral intermediates in an asymmetric synthesis of 1-carba(1-dethia)-3-hydroxy-3-cephem-4-carboxylic acids and esters and to monocyclic β-lactam antibiotics.